Let me rephrase...
What qualifications must one possess to be worthy of training you?
I don't have a dog in the race, but I believe you would be truly limiting your own potential by immediately discrediting any knowledge or skill someone may have to offer simply because of their age.
Let me rephrase. I did not mean to disrespect anyone's skills because of their age. I'm glad their younger than me and will go do those things I no longer want to.